A manual setup will need MORE pedal ratio than a power setup. It is reported that many power setups have ratios as low as 2.5 to 1 considering the linkages and such. Manual cars need a minimum of 4 to 1 but are better with higher ratios. I have a 6.6 to 1 ratio in my '70 Charger but I am also switching to hydroboost. Mine ought to stop quite well.
Dr Diff usually suggests a 15/16" bore for manual applications whether they are disc/drum or 4 wheel disc.
I actually just reached out to them a few minutes ago for a recommendation. I think I will need to add a proportioning valve too - not sure.
Thank you !
